In Svidler-Gelfand, the Israeli player sacrificed a pawn for pressure and won the material back leading to a drawn endgame.

Levon Aronian had better development, but an inferior structure. Later in order to liberate himself, Viswanathan Anand also gave up a pawn for activity, which he maintained into the endgame and proved to be sufficient to earn half-a-point.

After a quiet line in the Dragon, opposite bishops gave the middlegame a drawish nature. Later however a tactical sequence led to Black gaining the advantage. The Rook endgame was saved, under duress, by Ian Nepomniachtchi although my feeling is that Hikaru Nakamura may have missed a win.

In a Nimzoindian, Sergey Karjakin activated his knights and followed up with a pawn sacrifice which led to him obtaining interesting play. Magnus Carlsen however consolidated, but his attempt to break out led to complications and ultimately a drawn knight endgame.

Kramnik obtained pressure with a temporary pawn sacrifice. Later on he regained the pawn, and even picked up the exchange, but the endgame with pawns only on one wing was drawn.

Here is a summary of the fourth round games:

The table after the fourth round:

Details of the earlier games:

The first round:

The second round:

The third round:

More information from the official site:

http://www.russiachess.org/

Live games from 2pm local time

12 noon Paris, Madrid

11 am London

6am New York

3am Los Angeles

10pm Sydney